-31.89% is the change from 831 to 566
Calculation steps:
[( 566 - 831 ) ÷ 831] x 100 = -31.89%
Formula
Percentage change = [(566 - 831) / 831] x 100
Subtract the new number by the original number
566 - 831 = -265
-265 ÷ 831 = -0.31889290012033694
-0.31889290012033694 x 100 = -31.89%